/Engine/Plugins/Experimental/MeshModelingToolsetExp/Source/SkeletalMeshModifiers/Public/SkeletonModifier.h
FMirrorOptions
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Skeleton") bool MirrorBones ( const [TArray](API\Runtime\Core\Containers\TArray)< [FName](API\Runtime\Core\UObject\FName) > & InBonesName, const [FMirrorOptions](API\Plugins\SkeletalMeshModifiers\FMirrorOptions) & InOptions )